Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: test position - Bxa7

Author: Frank E. Oldham

Date: 16:42:45 03/23/05

Go up one level in this thread


On March 23, 2005 at 09:56:43, Tom Brake wrote:

>[D]k3rr2/ppp1nqbp/3pp1b1/PP2p3/NNP1Pp1Q/3P1P2/5BPP/RR2K3 w - - 0 1
>
>Bxa7!  Apparently not too easy to find for silicon, even in such a contrived
>position.
>

crafty 19.19 on a dual 2GHz G5

               10->   2.63  -0.95   1. b6 c5 2. bxa7 Bf6 3. Nb6+ Kxa7 4.
                                    Qh3 cxb4 5. Nc8+ Ka8 6. Nxd6 Qg8 7.
                                    Nxe8 Rxe8 8. Rxb4
               11     6.54  -0.80   1. b6 cxb6 2. axb6 a6 3. c5 Bf6 4.
                                    Qh3 Rd8 5. c6 Nxc6 6. Nxc6 bxc6 7.
                                    Ra3
               11    18.44     +1   1. Bxa7!!
               11    20.64  -0.42   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 Kd8 5. Qxb7 Nc8 6. b6 cxb6 7.
                                    Qxf7 Rxf7 8. axb6
               11->  21.01  -0.42   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 Kd8 5. Qxb7 Nc8 6. b6 cxb6 7.
                                    Qxf7 Rxf7 8. axb6 (s=2)
               12    26.41  -0.42   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 Kd8 5. Qxb7 Nc8 6. b6 cxb6 7.
                                    Qxf7 Rxf7 8. axb6
               12->  28.60  -0.42   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 Kd8 5. Qxb7 Nc8 6. b6 cxb6 7.
                                    Qxf7 Rxf7 8. axb6
               13     1:00     +1   1. Bxa7!!
               13     1:13   0.01   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 bxa6 5. Nb6+ cxb6 6. Qa8+ Kd7
                                    7. Qa7+ Kc8
               13->   1:16   0.01   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Qa7 bxa6 5. Nb6+ cxb6 6. Qa8+ Kd7
                                    7. Qa7+ Kc8
               14     1:59   0.19   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Nxc7 Rd8 5. Na6 bxa6 6. Qa7 Nd5
                                    7. Qxa6+ Qb7 8. cxd5 Qxa6 9. bxa6 Bf7
                                    10. Rb7 exd5 11. exd5
               14->   2:31   0.19   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. Na6+ Kc8
                                    4. Nxc7 Rd8 5. Na6 bxa6 6. Qa7 Nd5
                                    7. Qxa6+ Qb7 8. cxd5 Qxa6 9. bxa6 Bf7
                                    10. Rb7 exd5 11. exd5 (s=2)
               15     7:43     +1   1. Bxa7!!
               15    20:41     +3   1. Bxa7!!
               15    29:10   1.70   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. a6 Bxe4
                                    4. Nc6+ bxc6 5. bxc6+ Kc8 6. a7 Bxc6
                                    7. Nb6+ cxb6 8. a8=Q+ Bxa8 9. Qxb6
                                    Rd8 10. Rxa8+ Kd7 11. Ra7+ Ke8 12.
                                    Qb5+ Nc6 13. Rxf7 Kxf7 14. Qxc6
               15->  29:24   1.70   1. Bxa7 Kxa7 2. Qf2+ Kb8 3. a6 Bxe4
                                    4. Nc6+ bxc6 5. bxc6+ Kc8 6. a7 Bxc6
                                    7. Nb6+ cxb6 8. a8=Q+ Bxa8 9. Qxb6
                                    Rd8 10. Rxa8+ Kd7 11. Ra7+ Ke8 12.
                                    Qb5+ Nc6 13. Rxf7 Kxf7 14. Qxc6
              16    31:00   1/43*  1. Bxa7
White(1): ?
              time=31:06  cpu=395%  mat=0  n=4449406975  fh=89%  nps=2.38M
              ext-> chk=177127441 cap=18657577 pp=18232895 1rep=23245703
mate=1379551
              predicted=0  nodes=4449406975  evals=1704676935  50move=0
              endgame tablebase-> probes=0  hits=0
              SMP->  split=2621  stop=388  data=10/64  cpu=123:04  elap=31:06

Frank



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.